Drill press work clamp



April 29, 1941. R L 2,240,242

DRILL PRESS WORK CLAMP Filed Sept. 30, 1940 ATTORNEYS.

Patented Apr. 29, 1941 UNI PATEN .OFFICE i f 1 T.,,240,2i f f 1 I mar. PREss Wonk CLAMP I lt cole, TullahommTenn. l V Y "App'lication s' emb rao. 194d,sria1 Nt. 3591a Claims; ,(oi.77-'-s3) This invention aims to provide novel means for holding work under a variety of conditions, especially during the drilling oi holes, in the operation ofa drill press. 3 I

It is within theprovince oithe disclosureto improve generally and toenhance theutilityof devices of that type. to whichthe-present inven tion appertains.

With the above I which'will appear as the description proceeds, the invention" resides in the combination and arrangement of parts and in the detailsof construction hereinafter described and claimedFit being" understood that changesin the ;precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawing:

Fig. 1 shows, in side elevation, a device constructed in accordance with the invention;

Fig. 2 is a top plan;

Fig. 3 is an end elevation.

The device forming the subject matter of this application may be used in many ways, in the field of mechanics, but in order to avoid a waste of words, it will be presumed, for the purposes of illustration and description, that the article is an accessory to a drill press.

In the drawing, therefore, the letter D designates a drill press, including a post I, a work supporting table 2, and a rotatable shaft 3 carrying a chuck 4, retaining a drill 5 disposed above the work table 2.

In carrying out the invention, there is provided a work grip, which is marked generally by the letter G. The work grip G comprises a twopart, tubular carrier I, which functions as a clamp, since it can be retained in vertically adjusted positions on the post I, the carrier functioning, also, as a slide, since it can be adjusted vertically on the post I. The constituent members of the carrier I are held together by side connections, such as draw bolts 8. In order to adapt the carrier I to posts I of different diameters, bushings 9 are disposed within the constituent members of the carrier. One of the members of the carrier I is supplied with a lateral nipple I0, into which is threaded, or wherein is secured otherwise, a tubular guide II, located approximately at right anglesv to the post I and approximately parallel to the table 2.

The work grip G can be adjusted vertically along the post I, to secure a proper cooperation between the work grip and the material to be an d' other objects view,

held. As to the way in which the work:grip .Gf is retained ,in vertically adjusted positions, thismay be done by tightening up the draw bolts 8 Some operators prefer to leave the draw bolts 8a little slack, so that the carrier 8 and its bushings 9 do not grip the post I closely. Under. suchconditions, a downward tap with a hammer, on the nipple I0 of the guide I I, will cause diagonally opposite portions of the bush ings .9 ,to gripthe post I frictionally a release beingeffected by tapping upwardly on the nipple II] of the guide II: all of which adjustment'is a well understood proceeding.

is supplied with a downwardly extended andforwardly prolonged bracket I8, merging into a broadened foot plate I9 arranged approximately parallel to the arm I2 and adapted to be disposed underneath the fingers I4.

Assuming that the holder H is retracted into an out of the way position, the carrier I can be adjusted vertically on the post I, and be held in vertically adjusted position by either of the pro- .cedures hereinbefore referred to. The arm I2 can be adjusted in and out, in the guide II, until the lower ends of the fingers I4 are positioned properly with respect to the work, and with respect to the Work table 2, the work being held down on the work table, to be operated on by the drill 5. If a circular object, such as a rod, is to be drilled, it is received in the recesses I5 of the fingers I4 and is pressed against the work table 2.

The foot I9 of the holder H is provided with a plurality of holes 20 of different diameters. The holder H can he slid in and out on the guide I I, until any selected hole 20 is positioned properly with respect to the drill 5, so far as a component in the direction of the arrow A of Fig. 2 is concerned. The necessary component in the direction of the arrow B may be obtained by giving the entire tool or work grip G a horizontal swinging adjustment on the post I.

If an object, such as a washer, is bound between the foot I9 and the work table 2, and is positioned under a selected one of the holes 20, it will be obvious that, as the drill 5 descends, the drill will enter the selected hole 20 and enlarge the opening in the washer or similar work.

During the operation last above referred to, the arm I2 can be slid in the guide I I, toward the post I, so that the fingers M are not in the way of the descending drill 5, an observation which will be understood readily when the solid line portion of Fig. 2 is examined.

It should be noted that the arm l2 and its fingers M are not without function, even though they are out of the Way of the descending drill 5. The bracket l8 and the foot plate l9 are by no means the strongest part of the machine, and even though the arm [2 may have been retracted, as aforesaid, the lower ends of the fingers l4 still will bear on the foot plate [9, sustaining and reinforcing the foot plate, and makingit efiicient to hold the washer or other object firmly down on the work table 2. I

When the occasion for the use of the device forming the subject matter of this application has passed, it can be swung to-one side, as indicated in dotted lines in Fig. 2 of the drawing. The drill 5 then functions with respect to the work table 2 in the usual way.

The device forming the subject matter of this application is simple in construction, will be found effective to consummate the objects set forth in the opening portion of this specification.

Having thus described the invention, what is claimed is:

1. In a work holder of the class described, a work grip including a carrier shaped for adjustment longitudinally of a support, a guide on the carrier, 9. work holding foot plate disposed substantially at right angles to the direction in which the'carrier is adjustable, and having a hole for the passage of a drill, means for mounting the foot-plate on the grip for adjustment in a direction substantially at right angles to the direction in which the carrier is adjustable, and an arm adjustable on the guide in a direction substantially parallel to the foot plate and having transversely spaced fingers bearing upon and sustaining the foot plate.

3. In a work holder of the class described, a work grip including a lateral guide, a work holding foot plate disposedfsubstantially parallel to the guide and having an opening for the passage of a drill, means for mounting the foot plate on the work grip for adjustment in a direction substantially parallel to [the guide, and an arm adjustable on the guide in a direction substantially parallel to the foot plate, and having 'a finger extended into contact with the foot plate, in sustaining relation thereto.

WILLIAM F. COLE. 

